CN103302990A

CN103302990A - Liquid consumption device and liquid residual determination method

Info

Publication number: CN103302990A
Application number: CN2012105837367A
Authority: CN
Inventors: 佐藤润
Original assignee: Seiko Epson Corp
Current assignee: Seiko Epson Corp
Priority date: 2012-03-12
Filing date: 2012-12-28
Publication date: 2013-09-18
Anticipated expiration: 2032-12-28
Also published as: JP2013188879A; US9200942B2; US20130233047A1; JP5970876B2; CN103302990B

Abstract

A liquid consumption device includes a replaceable liquid container, a sensor, a fault finding section, an estimation section and a determination section. The sensor detects whether or not liquid has reached a predetermined amount. The fault finding section finds whether there is a fault in the sensor. The estimation section calculates an estimated value of a consumption amount of the liquid. The determination section carries out determination based on the estimated value of the liquid container and a threshold value which is specified based on threshold value information when a fault in the sensor has been found. The determination section carries out the determination based on the sensor when a fault in the sensor has not been found and to calculate the threshold value information based on the estimation value when the sensor detects that the liquid has reached the predetermined amount.

Description

The determination methods of liquid consuming device and liquid residue

Technical field

The present invention relates to the determination methods of liquid consuming device and liquid residue.

Background technology

In liquid consuming device, printing equipment such as ink jet type, the liquid container (print cartridge) that can take off is installed generally.For the liquid (ink) that detects in the print cartridge has reached below the scheduled volume, following method is for example arranged.Namely, setting possesses the optical pickocff of light-emitting component and photo detector near ink chamber, make bottom surface (with the drift angle of the prism relative face) incident of light from being arranged on the prism on the print cartridge, detect catoptrical intensity, this reverberation changes along with the having or not of ink on the reflecting surface of prism from prism and its intensity, and this is to detect a kind of method (below be also referred to as " sensor method ") that has or not ink at the prismatic reflection face.In addition, also has following methods: calculate the discharge number of times from the ink droplets of print head, multiply by the discharge number of times with predefined every discharge China ink amount once, calculate thus exhausted amount of ink (below be also referred to as " some counting method ").In addition, also have a kind of technology, it combines sensor method and some counting method, according to the detected exhausted amount of ink of sensor method the exhausted amount of ink that a counting method calculates is revised (such as patent documentation 1 and patent documentation 2).

Yet, in the technology of patent documentation 1 and patent documentation 2 records, when sensor breaks down, owing to can not the exhausted amount of ink that a counting method is calculated be revised, might detect exactly ink less than scheduled volume.This problem has been not limited only to utilize the sensor method of prism, also is the common problem of having utilized the method for the various sensors that comprise piezoelectric element and having put counting method when combining.

[prior art document]

[patent documentation]

[patent documentation 1] TOHKEMY 2003-39694 communique

[patent documentation 2] TOHKEMY 2003-39695 communique

Summary of the invention

Consider the problems referred to above, the problem to be solved in the present invention is: even provide a kind of in the situation that can not detect ink by sensor and reached below the scheduled volume, also can detect accurately ink and reach the following technology of scheduled volume.

The present invention finishes at least a portion that addresses the above problem, and can realize by following mode or application examples.

[application examples 1] a kind of liquid consuming device has: liquid container, and this liquid container can be changed; Sensor, whether the liquid that detects in the described liquid container has reached predetermined amount; The fault of described sensor detects in fault detect section; The reckoning value of the consumption of the liquid in the described liquid container is calculated by reckoning section; And judging part, judge whether described liquid has reached described predetermined amount, when detecting the fault of described sensor, described judging part carries out described judgement according to the described reckoning value that is installed at present the liquid container in the described liquid consuming device with based on the threshold value that threshold information determines; When not detecting the fault of described sensor, described judging part carries out described judgement based on described sensor, and the described reckoning value when detecting described liquid and reached described predetermined amount according to described sensor is calculated described threshold information.

If this structure, then when not detecting the fault of sensor, the reckoning value of the consumption of the liquid when reaching scheduled volume according to liquid, calculate be used to the information of obtaining threshold value (threshold information), if detect the fault of sensor, then can judge that liquid has reached predetermined amount according to reckoning value and the threshold value of the consumption of liquid.Therefore, even sensor breaks down, also can judge accurately liquid and reach predetermined amount.

[application examples 2] is according to application examples 1 described liquid consuming device, it is characterized in that, described threshold information is calculated based on following ratio, and this ratio is the described reckoning value of described sensor when detecting liquid in the described liquid container and having reached described predetermined amount and the ratio of the theoretical value of the consumption of the described liquid of the liquid in the described liquid container when reaching described predetermined amount.

If this structure, the ratio of the consumption (theoretical value) of the liquid when the reckoning value of the consumption of the liquid in the time of then can making threshold value reflection sensor detect liquid in the liquid container to have reached scheduled volume and the liquid in the liquid container reach scheduled volume.Therefore, even sensor breaks down, also can judge accurately liquid and reach predetermined amount, and can extrapolate exactly liquid and reach the amount of liquid that can use after the predetermined amount.

[application examples 3] is according to application examples 2 described liquid consuming devices, it is characterized in that, described judging part is obtained the statistical value of described ratio as described threshold information by predetermined statistical computational methods, when detecting the fault of described sensor, the value that the theoretical value of the consumption of the described liquid when described judging part reaches described predetermined amount with described liquid draws divided by described threshold information is as described threshold value.

If this structure, the trend of the ratio of the consumption (theoretical value) of the liquid when the reckoning value of the consumption of the liquid in the time of then can making threshold value reflection sensor detect liquid in the liquid container to have reached scheduled volume and the liquid in the liquid container reach scheduled volume.Therefore, even sensor breaks down, also can judge accurately liquid and reach predetermined amount, and can extrapolate exactly liquid and reach the amount of liquid that can use after the predetermined amount.

[application examples 4] is according to application examples 1 described liquid consuming device, it is characterized in that, described liquid container can be replaced by the capacity liquid container different from it, in described liquid consuming device, be equipped with at present in capacity and the situation as the different liquid container of the liquid container of benchmark, when detecting the fault of described sensor, the ratio of the theoretical value of the consumption of the theoretical value of the consumption of the described liquid when described judging part reaches described predetermined amount according to the liquid in the different liquid container of described capacity and described described liquid when reaching described predetermined amount as the liquid in the liquid container of benchmark, and the described threshold information of described liquid container as benchmark, calculate the described threshold value that is applicable to the different liquid container of described capacity, and the described reckoning value according to this threshold value liquid container different with described capacity is carried out described judgement, when not detecting the fault of described sensor, described judging part carries out described judgement based on described sensor, and the described reckoning value when detecting liquid in the different liquid container of described capacity and reached described predetermined amount according to described sensor, and the ratio of the theoretical value of the consumption of the theoretical value of the consumption of the described liquid of the liquid in the different liquid container of described capacity when reaching described predetermined amount and described described liquid when reaching described predetermined amount as the liquid in the liquid container of benchmark, calculate the described threshold information of described liquid container as benchmark.

If this structure, then when detecting the fault of sensor, even be equipped with capacity with as the different liquid container of the liquid container of benchmark, when the reckoning value of the different liquid container of capacity reaches the threshold value of the different liquid container of the capacity of being applicable to, also can judge liquid and reach predetermined amount.Therefore, even the capacity of liquid container is different, also can judge according to identical threshold information.In addition, when not detecting the fault of sensor, can be according to the ratio as the theoretical value of the liquid container of the benchmark liquid container different with capacity, and the reckoning value of the consumption of the liquid when judging that based on sensor liquid in the different liquid container of capacity has reached scheduled volume, calculate the threshold information as the liquid container of benchmark.Therefore, owing to need to not calculate respectively and upgrade threshold information for the capacity of each liquid container, therefore increase the renewal frequency of threshold information, reached predetermined amount thereby can judge accurately liquid.

[application examples 5] is according to application examples 4 described liquid consuming devices, it is characterized in that, when the different liquid container of present described capacity is installed in the described liquid consuming device, as described threshold information, described judging part is by predetermined statistical computational methods, the theoretical value of the consumption of the described liquid the when theoretical value of obtaining the consumption of described described liquid when reaching described predetermined amount as the liquid in the liquid container of benchmark reaches described predetermined amount divided by the liquid in the different liquid container of described capacity and the correction value that draws, the product of the described reckoning value when having reached described predetermined amount from liquid in described sensor detects the different liquid container of described capacity, and described sensor detects the statistical value of described described reckoning value when having reached described predetermined amount as the liquid in the liquid container of benchmark, when detecting the fault of described sensor, described judging part draws described threshold information divided by described correction value value is as described threshold value.

If this structure, then because the reckoning value when obtaining described sensor and detecting liquid in the different liquid container of capacity and reached described scheduled volume and the product of correction value, detect the statistical value of the reckoning value when having reached scheduled volume as the liquid in the liquid container of benchmark with described sensor, be used as threshold information, therefore regardless of the capacity of liquid container, the trend of the reckoning value in the time of can both making threshold value reflection sensor detect liquid in the liquid container to have reached scheduled volume.

[application examples 6] is according to application examples 1 described liquid consuming device, it is characterized in that, as described threshold information, the statistical value of the described reckoning value when described judging part is obtained described sensor and detected described liquid and reached described predetermined amount by predetermined statistical method, when detecting the fault of described sensor, the value that described judging part will be identical with described threshold information is as described threshold value.

If this structure, then because the statistical value of the reckoning value when obtaining sensor and detecting liquid and reached scheduled volume is used as threshold information, the trend of the reckoning value in the time of therefore can making threshold value reflection sensor detect liquid in the liquid container to have reached scheduled volume.Therefore, even sensor breaks down, also can judge more accurately liquid and reach predetermined amount.

[application examples 7] is according to the described liquid consuming device of any one application examples in application examples 3, application examples 5 and the application examples 6, it is characterized in that, described predetermined statistical computational methods are weighted mean method, and the weight of the value of recently addition is maximum in order to calculate described statistical value.

If this structure, before then sensor is about to break down in order to calculate statistical value the weight of the value of addition maximum, therefore can reflect the Expenditure Levels of the liquid just in the liquid consuming device, and can judge liquid and reached predetermined amount.

[application examples 8] is characterized in that according to the described liquid consuming device of any application examples in the application examples 1 to 7, and have a plurality of described liquid containers, described judging part is calculated respectively described threshold information for each described liquid container.If this structure even then sensor breaks down, also can be judged liquid for each liquid container accurately and reach predetermined amount.

[application examples 9] is according to application examples 1 to 3, and the described liquid consuming device of any application examples in the application examples 6 to 8, it is characterized in that, described liquid container can be replaced by the different liquid container of capacity, and described judging part is calculated respectively described threshold information for the different liquid container of each described capacity.If this structure even then the capacity of liquid container is different, also can be utilized corresponding respectively threshold information, judge accurately liquid and reached predetermined amount.

[application examples 10] is characterized in that according to the described liquid consuming device of any application examples in the application examples 1 to 9, and when the described threshold information of calculating reaches pre-determined number when above, described judging part carries out described judgement according to described reckoning value and described threshold value.If this structure, even then sensor breaks down, threshold value that also can be high according to reliability is judged more accurately liquid and has been reached predetermined amount.

The present invention can also realize as liquid residue determination methods and computer program except the structure as the aforesaid liquid consumer.This computer program can be recorded in the recording medium of embodied on computer readable.Can use such as various media such as floppy disk or CD-ROM, DVD-ROM, magneto-optic disk, storage card, hard disks as recording medium.

Description of drawings

Fig. 1 is that expression is as the stereogram of the major part of the printing equipment of one embodiment of the present of invention.

Fig. 2 is the brief configuration figure of printing equipment.

Fig. 3 is the stereogram of print cartridge.

Fig. 4 is the figure of overview that expression is arranged on the prism of inside, ink accommodation section.

Fig. 5 is the figure of the structure of expression control part.

Fig. 6 is the figure for the effectively black amount of explanation.

Fig. 7 comprises that ink is about to use up the flow chart of the printing treatment of determination processing.

Fig. 8 is that the expression ink is about to use up the figure that decision method switches the decision method that position and ink be about to use up.

Fig. 9 is the figure that expression is kept at an example of the data among the EEPROM.

Figure 10 is the figure for the object lesson of the study of description of step S40.

Figure 11 is the figure for the explanation print cartridge that effectively the China ink amount is different.

Figure 12 is the figure that calculates the consumption variance rate for explanation.

Figure 13 comprises that ink is about to use up the flow chart of the printing treatment of determination processing.

Figure 14 is the figure that expression is kept at an example of the data among the EEPROM.

Figure 15 is the figure for the object lesson of the study of description of step S45.

Figure 16 is the figure for the reckoning consumption variance rate of the explanation print cartridge that effectively the China ink amount is different.

Figure 17 is the figure that expression is kept at another example of the data in the EEPROM.

Figure 18 is the stereogram of another structure of expression print cartridge.

Figure 19 is the flow chart that ink is used up determination processing.

Figure 20 is the flow chart that ink is used up determination processing.

[label declaration]

10: printing equipment;

20: carriage;

30: paper pushing motor;

33: tray motor;

35: print head;

40: control part;

41：CPU；

45：EEPROM；

60: computer;

70: display floater;

72: interface;

81: fault detection board;

90: sensor;

92: light-emitting component;

94: photo detector;

101: the bottom surface;

100,100c, ICa, ICb, ICc, ICd, ICe, ICf, ICg: print cartridge;

110,110c: ink supply port;

120,120c: handle;

130,130c: ink accommodation section;

150,150c: substrate;

151: memory;

170,170c: prism;

170a, 170b: inclined plane;

411: the sensor fault test section;

412: the some count section;

413: judging part;

414: study section;

FFC1, FFC2: cable;

PA: printed medium;

HD: main scanning direction;

VD: sub scanning direction;

ADW: the consumption variance rate is calculated in study;

DW: calculate the consumption variance rate;

Cn: the study sensor detects the ink value of using up.

The specific embodiment

A. the 1st embodiment:

The structure of A – 1. printing equipments:

Fig. 1 is that expression is as the stereogram of the major part of the printing equipment 10 of one embodiment of the present of invention.Fig. 2 is the brief configuration figure of printing equipment 10.Removable print cartridge 100 is installed in the printing equipment 10, and this print cartridge 100 is examples of printing material box, utilizes the ink in the print cartridge 100 to print.Printing equipment 10 is combined with sensor method and some counting method, judges whether the ink surplus in the print cartridge 100 has reached predetermined amount.

Fig. 1 has drawn mutually perpendicular XYZ axle.In the present embodiment, under the use state of printing equipment 10, Z-direction is vertical, and the face of the X-direction of printing equipment 10 is positive.The main scanning direction of printing equipment 10 is Y direction, and sub scanning direction is X-direction.Printing equipment 10 as liquid consuming device has: carriage 20, and it is equipped with print cartridge 100 and possesses fault detection board 81, and described print cartridge 100 is used for holding the ink of every kind of colors such as cyan C, magenta M, yellow Y, black K; Tray motor 33 is used for along main scanning direction HD driven bracket 20; Sensor 90, the main scanning direction HD of itself and carriage 20 configures abreast, whether has reached predetermined amount for detection of the inks in the print cartridge 100; Paper pushing motor 30 is used for transporting printed medium PA along sub scanning direction VD; Print head 35, it carries on carriage 20, is used for discharging the ink of supplying with from print cartridge 100; And control part 40, they are connected connections via default interface 72 with computer, and print according to controlling tray motor 33, paper pushing motor 30 and print head 35 from the printed data of computer 60 receptions.Control part 40 connects the display floater 70 of the duty that is used for showing printing equipment 10 etc.And control part 40 is connected connection by cable FFC1 with carriage, is connected connection with sensor by cable FFC2.

Sensor 90 possesses light-emitting component 92 and photo detector 94.Sensor 90 is made of reflection-type photointerrupter.Sensor 90 possess as light-emitting component 92 such as LED, and as photo detector 94 such as phototransistor.The light-emitting component 92 of sensor 90 is luminous under the control of control part 40.The light-emitting component 92 of control part 40 control sensors 90 is lighted its pulse, by adjusting its PWM(Pulse Width Modulation, pulsewidth modulation) dutycycle (ratio of turn-on time and turn-off time) of signal adjusts luminous quantity.The reflection of the light that sends from LED by the prism 170 in the following print cartridge 100 is to photodiode incident.

The main scanning direction of the light-emitting component 92 of sensor 90 and photo detector 94 and carriage 20 is arranged side by side (Fig. 2) abreast.And sensor 90 is configured to: when the carriage 20 that moves owing to the driving of tray motor 33 is positioned at the top of sensor 90, the prism 170 in sensor 90 and the print cartridge 100 over against.

Fig. 3 is the stereogram of print cartridge 100.Print cartridge 100 has: ink accommodation section 130, and it roughly is rectangular shape also for the ink that holds as liquid; Handle 120 is used for loading and unloading print cartridge 100.Be formed with ink supply port 110 on the bottom surface 101 of print cartridge 100, it is used for being arranged on inserting for tattooing needle (not shown) on the carriage 20 when print cartridge 100 is installed on the carriage 20.Under the state before using, the opening of ink supply port 110 is by diaphragm seal.When being installed to print cartridge 100 on the carriage 20 from the top, can be from print cartridge 100 to print head 35 supply with inks.In ink accommodation section 130, the installation site of versicolor ink is decided according to every kind of color.

Print cartridge 100 possesses substrate 150, and its back side is equipped with the memory 151 for the storage information relevant with print cartridge 100.The information relevant with print cartridge 100 comprises: following reckoning consumption, effectively whether China ink amount, sensor 90 detect ink that ink is about to use up and are about to use up determination information and in the situation that the reckoning consumption that sensor 90 detects ink when being about to use up ink and being about to use up etc.Be described in detail later about these information.Hereinafter, the information relevant with print cartridge 100 is also referred to as " ink tank information ".Substrate 150 is provided with the terminal that is electrically connected with memory 151 with carriage 20 relative surfaces, and when print cartridge 100 was installed on the carriage 20, control part 40 becomes can be by the state of this terminal reference to storage 151.Thus, 40 pairs of memories of control part 151 carry out the read-write of ink tank information.

Fig. 4 is the figure of overview that expression is arranged on the prism 170 of ink accommodation section 130.Be provided with the prism 170 of isosceles right angle trigonometry column in the bottom (part of Z axis negative direction) of the inside of ink accommodation section 130.When the bottom surface incident from the light 201 of light-emitting component 92 irradiation to prism 170, prism 170 penetrates incident light according to the surplus of the ink IK in the ink accommodation section 130 to photo detector 94.Specifically, when the centre of luminescence of the summit of prism 170 and sensor 90 with when being subjected to center between the light center roughly consistent, if the degree that light inclined plane 170a, that come self-emission device 92 that the amount of the ink IK that holds in the ink accommodation section 130 reaches the summit that forms prism 170 contacts with ink IK to the reflecting surface of its incident, then the light path shown in solid line among Fig. 4 is such, reflect at inclined plane 170a from the wide part of light-emitting component 92 irradiations, IK absorbs by ink.This is because the refractive index of prism 170 and ink IK is roughly the same.On the other hand, reflecting part as the inclined plane 170a on the summit that forms prism 170, and the 170b place, inclined plane that receives the light that is reflected by inclined plane 170a receives the part (part of being correlated with reflection of light in the inclined plane) of incident light when contacting with air, namely, when the quantitative change of ink IK is lacked, because the refractive index of prism 170 and air is different, the light-emitting component 92 that possesses from sensor 90 carries out twice total reflection like that to the light path of light shown in the dotted line of Fig. 4 of the bottom surface irradiation of prism 170 in prism 170.Thus, from the direct of travel of the light of light-emitting component 92 incidents 180 degree counter-rotatings occuring, penetrates to photo detector 94.

Fig. 5 is the figure of the structure of expression control part 40.Control part 40 is made of CPU41, ROM43, RAM44 and EEPROM45.CPU41 brings into play function as following components: sensor fault test section 411 by pre-stored control program in ROM43 is launched and execution at RAM44; Point count section 412; Judging part 413 is used up for judging that following ink is about to use up with ink; And study section 414, be used for calculating and learning following study sensor and detect the ink value of using up and study reckoning consumption variance rate.In addition, CPU41 launches and carries out at RAM44 by the control program that is used for the comprehensively action of control printing equipment 10 that will be stored among the ROM43, thereby carries out printing treatment and the control of printing equipment 10 is processed.Printing treatment refers to, CPU41 is according to view data, generation is illustrated in the upper raster data that forms (opening), do not form (pass) point of main scanning direction HD that print head 35 moves, discharge ink droplet according to the raster data driven bracket 20, print head 35 and the paper pushing motor 30 that generate to the position of the expectation of printed medium PA, to form the dot pattern of presentation graphs picture or literal.In addition, during the RAM44 plugged, the reckoning consumption of the ink in following each print cartridge is temporarily stored in RAM44.In addition, printing equipment 10 do not power on during, the reckoning consumption of each print cartridge is stored in the memory 151 that EEPROM45 or print cartridge 100 possess.In addition, also store with following study sensor detection ink value of using up among the EEPROM45, learn to calculate consumption variance rate, study print cartridge number (study I/C number), a decision method switching relevant information.In the present embodiment, the study sensor detection ink value of using up is equivalent to " threshold value " based on " threshold information " of the present invention decision.And in the present embodiment, the value of threshold information and threshold value equate.

Point count section 412 is the function parts for the amount of calculating the ink that each print cartridge consumes, and described consumption is owing to printing treatment, regularly discharges ink (flushing) so that the suitable state of print head 35 maintenances and the cleaning (hereinafter being also referred to as " printing treatment etc. ") of print head 35 produce.Hereinafter, the exhausted amount of ink of reckoning is also referred to as " calculating consumption (reckoning value) ".Calculate that consumption is the consumption of the ink in the print cartridge that obtains by the some counting, can represent by the ratio with respect to following effective China ink amount.The discharge number of times that some count section 412 multiply by the ink of discharge in printing treatment etc. with the unit mass of ink droplet is calculated the consumption of ink.Then, calculate the aggregate-value from the consumption of the reckoning of using beginning of each print cartridge.This aggregate-value comprises the ink that the cleaning of flushing and print head 35 consumes.Point count section 412 is equivalent to " reckoning section " of the present invention.

Sensor fault test section 411 is to judge whether sensor 90 is in the function part of normal operating conditions.In this manual, the fault of sensor 90 refers to use sensor 90 to detect that ink is about to use up (seeing below) and ink is used up the situation of (seeing below).Therefore, not only when the circuit abnormal of sensor 90, can carry out normal luminously and be subjected to the light time that photo detector 94 also might occur owing to being polluted by ink mist can not fully to be subjected to the situation such as light at sensor 90, these situations also belong to " fault of sensor " among the present invention.For example, before judging part 413 judges whether the China ink amount has reached the moment of scheduled volume, perhaps at movable support bracket 20 so that fault detection board 81 and sensor 90 relative after, sensor fault test section 411 carries out the fault detect of sensor 90.Concrete fault detection method will see below.Sensor fault test section 411 is equivalent to " fault detect section " of the present invention.

Judging part 413 is to judge whether the amount of the ink in the print cartridge 100 reaches the function part of scheduled volume.After this, the state that the surplus of the ink in the print cartridge 100 has been reached scheduled volume is also referred to as " ink is about to use up ".And, the state that detects ink and consumed after being about to use up the ink of scheduled volume is called " ink is used up ".When sensor fault test section 411 did not detect the fault of sensor 90, judging part 413 judged that according to the output of sensor 90 ink is about to use up.As utilize Fig. 4 illustrates, if the ink IK in the ink accommodation section 130 is sufficient, the amount of the light of photo detector 94 incidents that then possess to sensor 90 will reduce.And if the reflecting part of inclined plane 170a, the 170b of prism 170 contacts with air, then the amount to the light of photo detector 94 incidents will increase.The amount of this light is converted into magnitude of voltage in the present embodiment to control part 40 outputs.In the present embodiment, the amount that is set to along with light of magnitude of voltage increases and reduces.By cable FFC2, judging part 413 obtains the magnitude of voltage that produces based on to the light of phototransistor incident, when the magnitude of voltage that obtains is lower than predefined magnitude of voltage corresponding to the ink surplus, is judged to be ink and is about to use up.After this, will judge that ink be about to use up based on the output of sensor 90 and be also referred to as " sensor detects ink and uses up ".In addition, when sensor fault test section 411 detected the fault of sensor 90, judging part 413 detects the ink value of using up according to following study sensor and the reckoning consumption judges that ink is about to use up.

Fig. 6 is the concise and to the point figure for the effectively black amount of explanation.Effectively the China ink amount refers to, in printing equipment 10, and the amount of the ink in the predefined print cartridge 100 that can carry out smoothly printing treatment etc.Specifically, effectively the China ink amount refers to, under standard environment, and the consumption of the ink in the print cartridge 100 when using printing equipment 10 in the mode of standard.That is, under standard environment, use printing equipment 10 in the mode of standard, when sensor 90 detects after ink is about to use up, the total amount of the consumption of the ink the when consumption of the ink of extrapolating by a counting reaches scheduled volume is effective China ink amount.The types such as ink capacity that effectively black amount maybe can be held according to the color that is contained in the ink in the print cartridge 100 preset.In addition, in the present embodiment, effectively the China ink amount is 10(g).According to the difference of the individual difference XOR environment for use of printing equipment etc., judge that ink is about to use up, consumption and the meeting shown in Figure 6 of the ink in the print cartridge when ink is used up be different.

When judging part 413 can not judge that ink be about to use up according to the output of sensor 90 when sensor 90 breaks down etc., if the reckoning consumption figure of being calculated by a count section 412 has reached the study sensor that is stored among the EEPROM45 and detected the ink value of using up, then be judged as and reached the state that ink is about to use up.If judging part 413 is judged the state that ink is about to use up that reached, then CPU41 is by being connected the display floater 70 that connects or are connected the display frame of the computer 60 that connects with printing equipment via interface 72 and show the information of impelling the user to change print cartridge 100 with control part.

In addition, judging part 413 is about to use up (sensor detect ink use up) and afterwards, when the reckoning consumption of judging a count section 412 has reached the consumption of predefined ink, is judged to be ink and uses up detecting ink.In the present embodiment, although when the consumption of the ink that begins when ink is about to use up of being calculated by a count section 412 has reached predefined amount, being judged to be ink uses up, but this is a kind of mode, for example, also can be judged to be ink when having reached the state that ink is about to use up uses up.

Reckoning consumption when study section that judging part 413 possesses 414 is judged to be ink and is about to use up according to the output based on sensor 90 utilizes following computing formula to calculate the study sensor and detects the ink value of using up.Calculate the study sensor and detect after the ink value of using up, study sensor detection ink value of using up that 414 pairs in study section is stored among the EEPROM45 is upgraded.

A – 2. comprises that ink is about to use up the printing treatment of determination processing:

Fig. 7 is that the ink that comprises that control part 40 is carried out is about to use up the flow chart of the printing treatment of determination processing.Flow chart as shown in Figure 7 is after printing equipment 10 powers on or change after the print cartridge 100 etc. and to be performed.In the present embodiment, print cartridge 100 adopts cyan C, magenta M, yellow Y, four kinds of print cartridges 100 of black K.And the print cartridge 100 that is installed in the color of the same race in the printing equipment 10 can be replaced by the print cartridge 100 of identical effective China ink amount.In addition, be about to use up the printing treatment of determination processing about the ink that comprises shown in Figure 7, also can in not having the scope of contradiction, should process all or part of repeatedly execution.

After printing equipment 10 powers on, perhaps change print cartridge 100 after, CPU41 reads the ink tank information that is stored in the memory 151 that each print cartridge 100 possesses, and is stored in the RAM44 (step S5).

CPU41 is about to use up determination information according to the ink that is included in this ink tank information read ink tank information from the memory 151 of print cartridge 100 after, whether this print cartridge 100 is detected ink by sensor 90 be about to use up and judge (step S7).

In print cartridge 100, when sensor 90 does not detect ink and is about to use up (step S7: no), CPU41 is about to use up decision method to the ink in the EEPROM45 and switches whether the position is that " 0 " judges (step S10).

Fig. 8 is that the expression ink is about to use up the figure that decision method switches the decision method that position and ink be about to use up.Ink is about to use up decision method, and to switch that the position is used for switching be output according to sensor 90, or detecting the ink value of using up according to following study sensor judges whether to reach the state that ink is about to use up.If ink is about to use up decision method and switches the position and be " 0 ", then judging part 413 is about to use up to ink according to the output of sensor 90 and judges.On the other hand, be " 1 " if decision method switches the position, then judging part 413 is about to use up to ink according to following study sensor detection ink value of using up with by the reckoning consumption that a count section 412 is calculated and judges.

If ink is about to use up decision method and switches the position and be " 0 " (step S10: be), then whether 411 pairs of sensor fault test sections can be judged that inks are about to use up by sensor 90 and judge (step S11).In the present embodiment, specifically, sensor fault test section 411 make carriage 20 mobile so that fault detection board 81 of the predetermined moment (timing) be positioned at sensor 90 directly over.Fault detection board 81 is made of the mirror that light is carried out total reflection.Shine the part of the light on the fault detection board 81 from light-emitting component 92 by the mirror-reflection of fault detection board 81 and to photo detector 94 incidents.When by the mirror-reflection of fault detection board 81 and when the amount of the light of photo detector 94 incidents is in the scope of the amount of predefined light, sensor fault test section 411 is judged as sensor 90 can use (step S11: be).In the present embodiment, the amount of light is converted into magnitude of voltage.When the magnitude of voltage that obtains according to the light quantity to photo detector 94 incidents during greater than predefined magnitude of voltage, sensor fault test section 411 for example is judged as that photo detector 94 is polluted by ink mist and can not fully be subjected to light.And when based on to the light quantity of photo detector 94 incidents and the magnitude of voltage that obtains during less than predefined magnitude of voltage, for example being judged as, the circuit of sensor 90 has occured unusually.At this moment, sensor fault test section 411 is judged as sensor 90 and can not uses (step S11: no).At this moment, sensor fault test section 411 can being connected with control part in the display frame of the computer 60 that the display floater 70 that connects or are connected with printing equipment via interface 72 connects, show and impel the user to repair the information of sensor 90 or cleaning fault detection board 81.In addition, the processing of step S11 is mounted in the common processing of all print cartridges on the printing equipment 10, and other are treated to the processing of single print cartridge.If in step S11, be judged as "No", then be installed at present on the printing equipment 10 all print cartridges will after carry out step S52 to the processing of step S80.

Judge (step S11: be) if be judged as to be about to use up by 90 pairs of inks of sensor, then CPU41 carries out the cleaning (step S20) of printing treatment, flushing or print head 35 according to instruction of user or computer etc.Point count section 412 is calculated the reckoning consumption according to the number of times of the ink droplet of discharging by the cleaning of printing treatment, flushing or print head 35.The reckoning consumption that CPU41 will leave in the RAM44 is updated to the reckoning consumption of calculating.

For example, finish moment of the printing of printed medium PA or carrying out the predetermined moment such as printing treatment, when carriage 20 moved to the top of sensor 90, whether judging part 413 is in the state that ink is about to use up according to the magnitude of voltage of sensor 90 to the quantity of ink of each print cartridge 100 was judged.When judging part 43 does not detect ink and is about to use up (step S30: no), continue to carry out the cleaning of printing treatment, flushing or the print head 35 of above-mentioned steps S20.

If going out ink according to the output detections of sensor 90, judging part 413 is about to use up (step S30: be), the reckoning consumption E when study section 414 detects ink and is about to use up according to judging part 413 _n, according to following formula (1) the study sensor is detected the ink value of using up C _nCalculate.

[formula 1]

C _n=αE _n+(1-α)C _n-1…（1）

The study sensor detects the ink value of using up C _nReckoning consumption E when being based on ink that sensor 90 detects print cartridge 100 for the n time and being about to use up _nStudy sensor when detecting ink for the n-1 time and be about to use up with sensor 90 detects the ink value of using up C _N-1And the statistical value of the reckoning consumption that calculates.At this, detect the ink value of using up C with the study sensor _nThe factor alpha that multiplies each other satisfies 0＜α＜1, gets in the present embodiment α=0.6.Because the study sensor that calculates according to formula (1) detects the ink value of using up C _nReckoning consumption " E when being about to use up by making judging part 413 just detect ink _n" and α directly multiply each other and obtain, so it is the value that can reflect the reckoning consumption when sensor 90 detects ink for the n time and is about to use up.That is, the print cartridge 100 that is installed at present on the printing equipment 10 is n print cartridge, is about to use up if sensor 90 detects these print cartridge 100 inks, then learns sensor and detects the ink value of using up C _nFor reflecting the reckoning consumption E of the print cartridge 100 that is installed at present on the printing equipment 10 _nValue.And the study sensor when sensor 90 detects ink the 1st time and is about to use up detects the ink value of using up C ₁With reckoning consumption E ₁Equate.The object lesson of study sees below.

Study section 414 calculates the study sensor and detects after the ink value of using up, and the study sensor that is stored among the EEPROM45 is detected the ink value of using up " C _N-1" be updated to the study sensor of newly calculating and detect the ink value of using up " C _n" (step S40).In addition, CPU41 detects after the ink value of using up is updated at the study sensor, updates stored in accumulative total number (learning the I/C number) among the EEPROM, detect the print cartridge of calculating object 100 of the ink value of using up as the study sensor.In the present embodiment, the study sensor detects the ink value of using up C _nAnd study I/C number is according to the color storage of the ink in the print cartridge 100.

Even detect after ink is about to use up at judging part 43, CPU41 is also the same with step S20, proceeds the cleaning (step S60) of printing treatment, flushing or print head 35 according to the indication of user or computer.In the default moment of step S30 between the step S60, the reckoning consumption when CPU41 will represent that sensor 90 detects ink that ink is about to use up and is about to use up determination information and ink and is about to use up is stored in the memory 151 of print cartridge 100.

Then, 413 pairs of judging parts are about to use up whether beginning has consumed scheduled volume by a counting quantity of ink from judging ink, namely whether reach the state that ink uses up and judge (step S70).

If judging part 413 judges inks and use up (step S70: be), then the display floater 70 that connects or are connected the information (step 80) of display frame display requirement replacing print cartridge 100 of the computer 60 that connects with printing equipment via interface 72 is connected in the CPU41 indication with control part.If judging part 413 is not judged ink and is used up (step S70: no), then return step S60, proceed the cleaning of printing treatment, flushing or print head 35.

In step S11, when sensor fault test section 411 judges that sensor 90 can not use (step S11: no), judging part 413 just can not go out ink and be about to use up according to the output detections of sensor 90.Therefore, judging part 413 judges that according to the study sensor detection ink value of using up ink is about to use up.Therefore, whether CPU41 at first reaches more than the predetermined value and judges (step S52) being stored in study I/C number among the EEPROM45.Although the predetermined value of study I/C number can Set arbitrarily, usually being set as sensor 90 can be owing to ink mist such as adheres at the value that breaks down.Therefore, although do not reach predetermined value at study I/C number, sensor fault test section 411 is judged in the sensor 90 out of use situations (step S52: no), supposes that printing equipment 10 or sensor 90 are unsettled use state.Therefore, when study I/C number does not reach predetermined value (step S52: no), CPU41 is being connected the display floater 70 that connects or are connected the display frame of the computer 60 that connects with printing equipment via interface 72 and show the information of the body mistake of expression printing equipment 10 with control part.

When study I/C number reaches predetermined value when above (step S52: be), CPU41 is about to use up decision method with ink and switches the position and be set as " 1 " (step S53).So, when power on next time, perhaps change after the print cartridge 100, CPU41 judges that the ink in the EEPROM45 is about to use up decision method switching position and is " 1 " (step S10: no), therefore carries out the determination processing that ink is about to use up according to the study sensor detection ink value of using up.

If ink is about to use up decision method and switches the position and be set as " 1 ", then being about to use up decision method with ink, to switch the position identical when being set as " 0 ", carries out the cleaning (step S54) of printing treatment, flushing or print head 35 in step S54.When judging that in step S10 ink is about to use up decision method switching position for " 1 ", carry out similarly the cleaning of printing treatment, flushing or print head 35 at step S54.

In step 54, carry out the cleaning of printing treatment, flushing or print head 35, in case the reckoning consumption that leaves among the RAM44 reaches the study sensor detection ink value of using up that is stored among the EEPROM45, then judging part 413 judges that inks are about to use up (step 57: be).When calculating that consumption does not reach the study sensor and detects the ink value of using up (step S57: no), then make the printing treatment of following ink to be about to use up determination processing return step S54, proceed the cleaning of printing treatment, flushing or print head 35.

Judge that ink is about to use up in case judging part 413 detects the ink value of using up according to the study sensor, then with ink be about to use up decision method switch be 0 o'clock identical, carry out the processing of above-mentioned steps S60 to S80.

Fig. 9 is that expression is about to use up the figure that determination processing is kept at an example of the data among the EEPROM45 by above-mentioned ink.The study sensor of print cartridge 100 of having preserved the ink of cyan C, magenta M, yellow Y, black K four kinds of colors among the EEPROM45 detects the ink value of using up and learns the I/C number.

Figure 10 is the figure for the object lesson of the study of description of step S40.Shown in the thick frame a1 of Figure 10, so that the 3rd print cartridge 100 to be installed in the printing equipment 10, and when being about to use up, the ink of judging this print cartridge 100 describes as example, in addition, shown in thick frame b1, so that n+1 print cartridge 100 to be installed in the printing equipment 10, and the ink of judging this print cartridge 100 describes as example when being about to use up.In addition, counting when I/C number shown in Figure 10 is brought into use from printing equipment 10, the print cartridge 100 which color of the same race, identical effective China ink are measured has been installed in expression.When printing equipment 10 has been installed the 3rd print cartridge 100, judge that sensor 90 can use (the step S11 of Fig. 7: be).Therefore, judging part 413 judges that according to the output of sensor 90 the 3rd print cartridge 100 is in the state that ink is about to use up.Reckoning consumption when going out ink and be about to use up according to the output detections of sensor 90 (below be also referred to as " sensor detect ink with as far as possible ") is " E ₃".According to this " E ₃" value and study sensor detect the ink value of using up C ₂, calculate the study sensor by above-mentioned formula (1) and detect the ink value of using up C ₃

On the other hand, when n+1 print cartridge 100 has been installed, judge that sensor 90 can not use (Fig. 7 step S11: no).If study I/C number at this moment reaches more than the predetermined value, then when calculating that consumption reaches the study sensor and detects the ink value of using up C _nThe time, judging part 413 judges that ink is about to use up.That is, when n+1 print cartridge had been installed, if judge that sensor 90 can not use, then the sensor of n+1 print cartridge detected ink with trying one's best and the study sensor detection ink value of using up " C _n" become identical value.

In printing equipment 10, because there is the deviation on making in each nozzle that print head 35 possesses etc., the China ink amount of 1 discharge of anticipation and actual China ink amount of discharging can be different.And because the individual difference of printing equipment 10, between individuality, also there are deviation in the China ink amount of 1 discharge in the design and actual China ink amount of discharging.Further, between each individuality, owing to there being the position deviation etc. of the prism 170 of the installation site deviation of sensor 90 or print cartridge 100, so sensor 90 detects the level that ink is about to use up and also has deviation.The exhausted amount of ink of the reality when in this case, judging that according to the output of sensor 90 ink is about to use up is not necessarily consistent with the reckoning consumption.Therefore, if according to calculating that consumption judges that ink is about to use up, then might be residual the ink of Duoing than the supposition amount, perhaps consumed the ink of Duoing than the supposition amount.Yet according to above-mentioned the 1st embodiment, the reckoning consumption when being about to use up according to the output judgement ink based on sensor 90 calculates the study sensor and detects the ink value of using up.Then, the study sensor detection ink value of using up was calculated before sensor 90 breaks down, the statistical value of the reckoning consumption when sensor detection ink is used up, whenever new print cartridge is installed, when consuming ink wherein and judging that by sensor 90 inks are about to use up, the renewal learning sensor detects the ink value of using up.Therefore, when sensor 90 breaks down, also can when calculating that consumption reaches the study sensor detection ink value of using up, judge that ink is about to use up.

The acquisition of multiplying each other of reckoning consumption when in addition, the study sensor detects the ink value of using up (at last) detected ink and be about to use up by sensor 90 by just and factor alpha.The value of factor alpha can be set for so that before sensor 90 will break down, judge that the reckoning consumption when ink is about to use up is maximum with respect to the ratio that the study sensor detects the ink value of using up.So, because therefore the value of the reckoning consumption that the study sensor detects the ink value of using up when detecting ink and use up state for reflecting just sensor has reflected ink discharge situation just, it can judge that ink is about to use up.

B. the 2nd embodiment:

In the 1st embodiment, the situation that the print cartridge 100 of the same ink color changed is had identical effective China ink amount is illustrated.That is, following situation is illustrated: after the ink in the print cartridge 100 is consumed, all have identical capacity by changing print cartridge 100 to the printing equipment 10 new print cartridges 100 of installing.Relative therewith, in the 2nd embodiment, to describing by the situation that more brings loading and unloading ink color print cartridge 100 identical, that still effectively the China ink amount is different.And the structure of the printing equipment 10 of the 2nd embodiment is identical with the 1st embodiment.

Figure 11 is the figure for the explanation print cartridge 100 that effectively the China ink amount is different.The color that is contained in the ink among print cartridge ICa and the print cartridge ICb is identical, and this print cartridge ICa, ICb are installed in the same position of carriage 20.Effective China ink amount of this print cartridge ICa, ICb is different, is respectively 10(g) and 20(g).In the present embodiment, in design, until judge that according to the output of sensor 90 ink is about to use up the ratio of the China ink amount that consumes (exhausted amount of ink when sensor detection ink is used up) and is 90%(9(g in print cartridge ICa)), be 95%(19(g in print cartridge ICb)).That is, in print cartridge ICa and print cartridge ICb, when under standard environment, using printing equipment 10 in the mode of standard, the amount of the liquid the when ink of being judged by sensor 90 is about to use up (theoretical value of the consumption of the liquid when reaching predetermined amount) difference.

Although the surplus of the ink when being detected ink and be about to use up by sensor is identical in design, but if the effectively different print cartridge 100 of China ink amount can be installed on the printing equipment 10, the reckoning consumption the when ink that then goes out according to the output detections of sensor 90 is about to use up can be different.Because the study sensor detects the ink value of using up for calculating the statistical value of consumption, therefore if calculate according to reckoning consumption shown in Figure 11, when judging that ink among print cartridge ICa and the print cartridge ICb is about to use up and the renewal learning sensor detects the ink value of using up, then should study sensor detect that the ink value of using up can be accumulated and effective black corresponding error of difference of measuring.

Therefore, the print cartridge 100 that CPU41 will have predetermined effectively black amount in advance is decided to be benchmark, when measuring not simultaneously as the print cartridge 100 of benchmark and effective China ink of the print cartridge 100 of installing, carries out following correction.In the present embodiment, by with a print cartridge ICa as benchmark, and the reckoning consumption the when sensor of another print cartridge ICb detected ink and use up revises, and calculates the study sensor and detects the ink value of using up.That is to say, suppose that to printing equipment 10 the effectively black amount print cartridge 100 identical with print cartridge ICa being installed upgrades the statistical value (the study sensor detects the ink value of using up) of calculating consumption.

The situation of the renewal learning sensor detection ink value of using up describes when at first, measuring different print cartridge ICb in conjunction with the Fig. 7 among above-mentioned the 1st embodiment to effective China ink has been installed.If print cartridge ICb has been installed, then identical with above-mentioned the 1st embodiment, CPU41 reads the ink tank information that is stored in the memory that print cartridge ICb possesses, and is stored in the RAM44 (the step S5 of Fig. 7).Then, be about to use up (the step S7 of Fig. 7: no) if in the print cartridge ICb that installs, do not detect ink by sensor 90, and ink is about to use up decision method switching position and is " 0 " (step S10 of Fig. 7: be), and can judge that inks be about to use up (the step S11 of Fig. 7: be) by sensor 90, then carry out the cleaning (the step S20 of Fig. 7) of printing treatment, flushing or print head 35 according to the indication of user or computer etc.

If going out print cartridge ICb ink inside according to the output detections of sensor 90, judging part 413 is about to use up (the step S30 of Fig. 7: be), then reckoning consumption (the ratio take effective China ink amount as the exhausted amount of ink of benchmark of study section 414 when detecting ink and be about to use up.Calculate when consumption and effectively black amount equate, calculate that consumption is 100%), following to the study sensor detection ink value of using up C _nCalculate.Specifically, ink consumption rate (95(%) when the ink consumption rate (90(%) when the sensor detection ink with respect in effective black design of measuring of print cartridge ICa is used up) using up divided by the sensor detection ink with respect in the design of effective China ink amount of print cartridge ICb), calculate thus correction factor.Then, the reckoning consumption that the sensor that multiply by print cartridge ICb with correction factor detects ink when using up is calculated the study sensor and is detected the ink value of using up.The study sensor of calculating print cartridge ICb detects after the ink value of using up, with to calculate study sensor as the print cartridge ICa of benchmark identical when detecting the ink value of using up, the study I/C number that the study sensor that leaves the print cartridge ICa among the EEPROM45 in is detected the ink value of using up and print cartridge ICa upgrades (the step S40 of Fig. 7).Then, identical with above-mentioned the 1st embodiment, carry out step 60 shown in Figure 7 to the processing of step 80.So, even the print cartridge ICb of different capabilities has been installed, reckoning consumption in the time of also can detecting ink by the sensor that multiply by this print cartridge ICb with correction factor and use up detects the ink value of using up to the study sensor as the print cartridge ICa of benchmark and upgrades.

Next, illustrate that the ink when print cartridge ICb being installed to printing equipment 10 and can not having judged that ink is about to use up (the step S11 of Fig. 7: no) by sensor is about to use up determination processing.Install after the print cartridge ICb, identical with above-mentioned the 1st embodiment, CPU41 reads the ink tank information that is stored in the memory 151 that print cartridge ICb possesses, and is stored in (the step 5) of Fig. 7 among the RAM44.Then, if the ink that does not detect among the print cartridge ICb of installation by sensor is about to use up (the step S7 of Fig. 7: no), and ink is about to use up decision method switching position and is " 0 " (step S10 of Fig. 7: be), and study I/C number sufficient (the step S52 of Fig. 7: be), then CPU41 carries out the cleaning (the step S54 of Fig. 7) of printing treatment, flushing or print head 35 according to the indication of user or computer etc.Then, when the reckoning consumption of print cartridge ICb reached the reciprocal of correction factor and detects the product of the ink value of using up as the study sensor of the print cartridge ICa of benchmark print cartridge 100, judging part 413 judged that inks are about to use up (the step S57 of Fig. 7).Afterwards, identical with above-mentioned the 1st embodiment, carry out step S60 shown in Figure 7 to the processing of step S80.So, when the reckoning consumption of the different print cartridge of effective China ink amount reaches the reciprocal of correction factor and detects the product of the ink value of using up as the study sensor of the print cartridge of effective China ink amount of benchmark, can judge that ink is about to use up.Therefore, even the different print cartridge of effective China ink amount has been installed, sensor 90 also can judge that ink is about to use up with equal precision.

According to the 2nd embodiment described above, study section 414 determines the print cartridges 100 as benchmark, and the reckoning consumption when detecting ink and use up according to the sensor in effective China ink amount and the design is calculated the consumption rate of the ink of sensor when detecting ink and using up.Then, the ink consumption rate when the ink consumption rate that the sensor of print cartridge 100 that is used as effective China ink amount of benchmark detects ink when using up detects ink and uses up divided by the sensor in the design of the print cartridge 100 that effectively the China ink amount is different is calculated correction factor.The reckoning consumption that the sensor that multiply by the different print cartridge 100 of effective China ink amount with this correction factor detects ink when using up, the study sensor of calculating as the print cartridge 100 of effective China ink amount of benchmark detects the ink value of using up.So, can be about to use up determination processing according to the ink shown in Figure 7 of the 1st embodiment, the study sensor be detected the ink value of using up upgrade.Therefore, detect the ink value of using up and study I/C number owing to need to not preserve the study sensor for each different print cartridge of effective China ink amount, therefore can effectively utilize the data storage area of printing equipment 10.And, even sensor 90 breaks down, when the reckoning consumption of the different print cartridge 100 of effective China ink amount reaches the reciprocal of correction factor and detects the product of the ink value of using up as the study sensor of the print cartridge 100 of effective China ink amount of benchmark, can judge that ink is about to use up.Therefore, even installing under effective China ink amount different print cartridge 100 and sensor 90 out of use situations, also can be to judge that with the equal precision of sensor 90 ink is about to use up.

C. the 3rd embodiment:

In the 1st embodiment and the 2nd embodiment, the reckoning consumption when detecting ink by sensor 90 and be about to use up is calculated the study sensor and is detected the ink value of using up.In the 3rd embodiment, the difference (calculating the consumption variance rate) of the exhausted amount of ink when detecting ink and use up according to the sensor in the design and the reckoning consumption when being about to use up by sensor 90 detected inks is calculated study and is calculated the consumption variance rate.And, calculate the study sensor according to study reckoning consumption variance rate and detect the ink value of using up.In addition, the structure of the printing equipment 10 among the 3rd embodiment is identical with the 1st embodiment.Study calculates that the consumption variance rate is to obtain the essential information that the study sensor detects the ink value of using up, and is equivalent to threshold information of the present invention.

Figure 12 is the figure that calculates consumption variance rate DW for explanation.Calculate consumption variance rate DW be expression when judging that by sensor 90 inks are about to use up the reckoning consumption and design on pass through sensor 90 and judge that inks are about to use up the time the value of ratio of exhausted amount of ink (theoretical value of the liquid-consumed amount when reaching scheduled volume), calculate by following formula (2).In addition, in the present embodiment, calculate that consumption is not the ratio with respect to effective China ink amount, but calculate by consumption (g).

[formula 2]

Figure 12 is the reckoning consumption variance rate of 3 print cartridges (ICc, ICd, ICe) of expression judging part 413 when judging that according to the output of sensor 90 ink is about to use up.Print cartridge ICc, ICd, ICe are the print cartridge of color of the same race.Effective China ink amount of print cartridge ICc, ICd, ICe is 10(g), and the consumption of the ink after being about to use up by an ink that counting is calculated is 1(g).In this print cartridge of the present embodiment, when judging part 413 judges that according to the output of sensor 90 ink is about to use up, consumed in design 9(g) ink.Yet owing to the environment for use of printing equipment with along with the reasons such as variation of time through occuring, the reckoning consumption when sensor detection ink is used up can be different.For example, the reckoning consumption that the sensor of print cartridge ICc, ICd, ICe detects ink when using up is different, is respectively 8.2(g), 9.0(g), 10.0(g).At this moment, the reckoning consumption variance rate of print cartridge ICc, ICd, ICe is different, is respectively 110(%), 100(%), 90(%).Calculate the consumption variance rate more near 100%, the difference of the exhausted amount of ink that the sensor during design detects ink when using up and the reckoning consumption when detecting sensor and detecting ink and use up is just less.In the present embodiment, the reckoning consumption variance rate DW when using up according to the sensor detection ink of calculating like this calculates study with following formula (3) and calculates consumption variance rate ADW.Study calculates that consumption variance rate ADW is the reckoning consumption variance rate DW that has just calculated _nWith than DW _nConsumption variance rate ADW is calculated in the study of more early calculating _N-1The statistical value of the reckoning consumption variance rate of calculating for the basis.In other words, study calculates that consumption variance rate ADW is " statistical value of ratio " of the consumption (theoretical value) of sensor in the design ink when detecting ink and using up and the reckoning consumption when in fact being about to use up based on sensor 90 judgement inks.

[formula 3]

{ADW}_{n} = \frac{{DW}_{n} + (n - 1) {ADW}_{n - 1}}{n} . . . (3)

Figure 13 is the flow chart that ink that the printing equipment 10 at the 3rd embodiment carries out is about to use up determination processing.The difference of the 1st embodiment (Fig. 7) and the 3rd embodiment is, when judging that according to the output of sensor 90 ink is about to use up, in the 1st embodiment, the study sensor is detected the ink value of using up and upgrade (the step S40 of Fig. 7), and in the 3rd embodiment, study reckoning consumption variance rate is upgraded (the step S45 of Figure 13).Object lesson about study sees below.In addition, in the 1st embodiment, when sensor 90 can not use (the step S11 of Fig. 7: no), and study I/C number is when sufficient (the step S52 of Fig. 7: be), and judging part 413 detects the ink value of using up judgement ink according to the study sensor and is about to use up (the step S57 of Fig. 7).Relative therewith, in the 3rd embodiment, study section 414 will learn to calculate that according to following formula (4) the consumption variance rate is transformed to the study sensor and detects the ink value of using up, when calculating that consumption reaches the study sensor detection ink value of using up, judging part 413 judges that inks are about to use up (the step S59 of Figure 13).Other processing is owing to identical with the 1st embodiment, therefore in this description will be omitted.

[formula 4]

Figure 14 represents to be about to use up the figure that determination processing is kept at an example of the data among the EEPROM45 by the ink of Figure 13.In the 1st embodiment, preserve the study sensor for each print cartridge 100 of cyan C, magenta M, yellow Y, four kinds of ink colors of black K and detect the ink value of using up and study I/C number, and in the 3rd embodiment, preserve study and calculate consumption variance rate and study I/C number.

Figure 15 is the figure for the object lesson of the study of description of step S45.Below, print cartridge 100 for ink color of the same race (for example black K), the situation when the 3rd print cartridge 100 being installed in the printing equipment 10 shown in the thick frame a2 among Figure 15 and having judged that ink in this print cartridge 100 is about to use up respectively, and in the printing equipment 10 shown in the thick frame b1 n+1 print cartridge 100 has been installed and judged that the situation when ink in this print cartridge 100 is about to use up describes as example.In addition, I/C number is as shown in figure 15 counted when printing equipment 10 is brought into use, and what expression was installed is the print cartridge of which identical ink color, effectively black amount.When the 3rd print cartridge has been installed, judge that sensor 90 can use (the step S11 of Figure 13: be).Therefore, in the 3rd print cartridge, judging part 413 judges that according to the output of sensor 90 ink is about to use up.At this moment reckoning consumption (sensor detects ink with trying one's best) is " E ₃".Study section 414 is by formula (2), the reckoning consumption " E in the time of will judging ink and be about to use up according to the output of sensor 90 ₃" be converted to and calculate consumption variance rate " DW ₃".Then, according to calculating consumption variance rate " DW ₃" and the study of when using up (sensor of the 2nd print cartridge 100 detects ink) study last time calculate consumption variance rate " ADW ₂", calculate study by formula (3) and calculate consumption variance rate " ADW ₃".

On the other hand, when n+1 print cartridge had been installed, determine sensor 90 can not use (the step S11 of Figure 13: no).If study I/C number at this moment reaches predetermined I/C number (the step S52 of Figure 13: be), the reckoning consumption of then calculating when some count section 412 reaches the study sensor and detects the ink value of using up C _nThe time, judging part 413 judges that ink is about to use up (the step S59 of Figure 13).At this moment study sensor detects the ink value of using up C _nThe value that exhausted amount of ink when calculating that according to study consumption variance rate ADW and sensor detect ink and use up is calculated can be obtained by above formula (4).

According to the 3rd embodiment described above, the reckoning consumption when being about to use up according to the output judgement ink based on sensor 90 calculates calculates the consumption variance rate.Then, learn to calculate the consumption variance rate according to calculating that the consumption variance rate is calculated.Afterwards, when sensor 90 broke down, the exhausted amount of ink when using up by making sensor detect ink was calculated the consumption variance rate divided by study, is converted to the study sensor and detects the ink value of using up.When the reckoning consumption of a count section 412 reckonings reaches the study sensor detection ink value of using up of trying to achieve like this, be judged to be ink and be about to use up, therefore can be to judge that with sensor 90 equal precision liquid have reached the state that ink is about to use up.And consumption variance rate ADW is calculated in study _nThat (at last) detects the reckoning consumption variance rate DW that calculates when ink is about to use up by sensor 90 with just _nConsumption variance rate ADW is calculated in the study of calculating before this _N-1The statistical value of the reckoning consumption variance rate DW that calculates for the basis.Therefore, if judge the words that ink is about to use up according to study sensor detection ink value of using up that study reckoning consumption variance rate is tried to achieve, judge that then ink is about to use up the afterwards spendable black deviation of measuring and will diminishes, use up rear spendable black measuring thereby can correctly extrapolate sensor detection ink.Effective China ink that therefore, can not consume in the print cartridge 100 is measured with remaining.

D. the 4th embodiment:

In the 1st embodiment and the 3rd embodiment, the study sensor of having calculated the print cartridge 100 with same effective China ink amount detects the ink value of using up.In addition, in the 2nd embodiment, by revising take predetermined print cartridge 100 as benchmark and to the different print cartridge 100 of effective China ink amount, calculated the study sensor and detected the ink value of using up.In the 4th embodiment, even effective China ink amount of print cartridge 100 is different, also needn't as the 3rd embodiment, revise, detect the ink value of using up but calculate the study sensor according to study reckoning consumption variance rate.

Figure 16 is the figure for the reckoning consumption variance rate of the explanation print cartridge 100 that effectively the China ink amount is different.The color that is contained in the ink among print cartridge ICf and the print cartridge ICg is identical, and this print cartridge ICf, ICg are in the same position loading and unloading of carriage 20.About this print cartridge ICf, ICg, going out ink according to the output detections of sensor 90 is 1(g by a consumption of the ink that counting is calculated after being about to use up), but effectively the China ink amount is different, is respectively 10(g) and 20(g).In the present embodiment, in design, when using up (exhausted amount of ink that sensor detects ink) is as follows until the China ink amount that consumes when judging that according to the output of sensor 90 ink is about to use up: print cartridge ICf is 9(g), print cartridge ICg is 19(g).

As shown in figure 16, even effectively the China ink amount is different, the reckoning consumption variance rate of print cartridge ICf is 100(%), the reckoning consumption variance rate of print cartridge ICg is 100(%).That is to say, calculate the value of consumption variance rate and do not rely on effective China ink amount.Therefore, obtain the study sensor and detect the ink value of using up by calculate consumption variance rate (namely calculating the statistical value of consumption variance rate) based on study, even effectively the China ink amount is different, also can be as the 2nd embodiment, need not regulation as the print cartridge 100 of benchmark and the study sensor of the different print cartridge 100 of effective China ink amount is detected the ink value of using up revise, just can calculate and learn reckoning consumption variance rate and it is upgraded.

According to the 4th embodiment described above, even use the effectively different print cartridge of China ink amount, owing to the value of calculating the consumption variance rate does not rely on effective China ink amount, so study section 414 need not to revise the study reckoning consumption variance rate that just can calculate and upgrade for judging that ink is about to use up.In addition, owing to each the effectively black amount that need not for print cartridge 100 saves the data among the EEPROM45, therefore can effectively utilize the data storage area of printing equipment 10.

E. variation:

Various embodiment of the present invention more than has been described, but the present invention is not limited to above-described embodiment, can in the scope that does not break away from its purport, adopts various structures.For example, the function that realizes by software also can realize by hardware.In addition, can also followingly be out of shape.

E-1. variation 1:

When reading the memory 151 of CPU41 possesses the information of print cartridge 100 from print cartridge 100 substrate 150, study section 414 can determine whether the print cartridge 100 that the manufacturer of printing equipment 10 guarantees according to the information of this memory 151 etc.When not being the print cartridge 100 that guarantees, the quality such as the viscosity of ink might be different, and the reckoning consumption of at this moment being calculated by a count section 412 might be very different.In addition, do not having between the guaranteed print cartridge, effectively the deviation of effective China ink amount of the print cartridge of manufacturer's assurance of the deviation ratio printing equipment 10 of China ink amount is larger sometimes.Therefore, the ink value of using up can be detects and study reckoning consumption variance rate is not learnt to the study sensor of this print cartridge 100 in study section 414, and renewal learning I/C number not.Like this, can increase the reliability that the study sensor detects the ink value of using up and study reckoning consumption variance rate.In addition, study section 414 can be according to the information of the memory 151 of print cartridge 100, judges that whether mounted print cartridge 100 is for the filling print cartridge to the ink flow path filling ink of printing equipment 10.The ink value of using up can be detects and study reckoning consumption variance rate is not learnt to the study sensor of this print cartridge 100 in study section 414, and renewal learning I/C number not.Like this, can increase the reliability that the study sensor detects the ink value of using up and study reckoning consumption variance rate.

E – 2: variation 2:

Figure 17 is the figure that expression is kept at another example of the data among the EEPROM45.In above-mentioned the 1st embodiment (Fig. 9) and the 3rd embodiment (Figure 14), the print cartridge 100 study sensor separately of having preserved the color inks of cyan C, magenta M, yellow Y among the EEPROM45 detects the ink value of using up or study is calculated the consumption variance rate and learnt the I/C number.Relative therewith, when the ink discharge outlet of color inks directly waits about equally, owing to the color inks that can use identical study sensor detection ink value of using up to all colours carries out the judgement that ink is about to use up, therefore can also preserve as shown in Figure 17 for example typical value of the data of the print cartridge 100 of the color inks of cyan C, magenta M, yellow Y.Specifically, in color inks, the study sensor of any print cartridge 100 detects the ink value of using up and can be applied in other color inks, detect the ink value of using up even preserved the study sensor of the print cartridge 100 of for example yellow Y that calculates as the data of " colour ", also can with should study sensor detection ink value of using up study sensor detection ink value of using up of print cartridge 100 by the cyan C that calculates upgrade.At this moment, after the study sensor of the print cartridge 100 of any color inks detection ink value of using up is updated, can both make study I/C number increase " 1 ".So, can suppress to be kept at data capacity among the EEPROM45.

E – 3: variation 3:

In the above-described embodiments, although use optical sensor as sensor 90, the sensor 90 that uses in the printing equipment 10 is not limited to this.For example, also can use the sensor that has utilized piezoelectric element, described piezoelectric element is owing to applying voltage and bending.

E – 4: variation 4:

When based on the magnitude of voltage that is reflected by fault detection board 81 and produce to the light of photo detector incident when a reference value reduces or increased, CPU41 also can regulate the light quantity that penetrates from light-emitting component 92.Like this, because therefore the stable output of sensor 90 can judge correctly that also ink is about to use up.

E – 5: variation 5:

The present invention also can adopt the print cartridge with other arbitrary structures 100 except the print cartridge 100 shown in above-described embodiment.Figure 18 is the stereogram of another structure of expression print cartridge 100.In the 130c of the ink accommodation section of print cartridge 100c, substrate 150c also can tilt to install.In addition, prism 170c also can be arranged on handle 120c one side.And ink supply port 110c also can seal by lid or film (not shown) etc.

E – 6: variation 6:

In above-mentioned the 1st embodiment, after the judgement ink is about to use up (the step S30 of Fig. 7 or step S57), when having consumed the China ink amount of scheduled volume by a counting, the judgement ink is used up (the step S70 of Fig. 7).In addition, judging part 413 also can be used up and the study sensor be detected the ink value of using up upgrade according to sensor 90 judgement inks.In addition, identical with the 1st embodiment when sensor 90 breaks down, also can use up according to study sensor detection ink value of using up and reckoning consumption judgement ink.

Figure 19 is the flow chart that the ink of control part 40 execution is used up determination processing.In this variation, use up decision method switching position for the ink that switches following two kinds of methods and be stored in EEPROM45: the output according to sensor 90 judges whether to reach the state that ink is used up, and perhaps detects the ink value of using up according to the study sensor and judges whether to reach the state that ink is used up.

At first, identical with above-mentioned the 1st embodiment after installing print cartridge 100, CPU41 reads the ink tank information that is stored in the memory 151 that print cartridge 100 possesses, and deposits RAM44(step S205 in) in.Then, in mounted print cartridge, use up (step S207: no) if do not detect ink by sensor 90, and ink is used up decision method switching position and is " 0 " (step S210: be), and sensor 90 can judge that ink uses up (step S211: be), then carries out the cleaning (step S220) of printing treatment, flushing or print head 35 according to indication of user or computer 60 etc.

If judging part 413 is used up (step S230: be) according to the ink that the output detections of sensor 90 goes out in the print cartridge 100, then the ink value of using up C detects to calculate the study sensor with the identical mode of above-mentioned the 1st embodiment in study section 414 _nThen, the renewal learning sensor detects the study I/C number (step S240) of the ink value of using up and print cartridge, and the display floater 70 that connects or are connected the information (step S280) of display frame display requirement replacing print cartridge 100 of computer 60 of connection with printing equipment via interface 72 is connected in the CPU41 indication with control part.

On the other hand, if in mounted print cartridge 100, do not detect ink by sensor 90 and use up (step 207: no), and ink is used up decision method switching position and is " 0 " (step S210: be), and sensor 90 can not use (step S211: no), and then whether CPU41 reaches more than the predetermined value and judge (step S252) being stored in study I/C number among the EEPROM45.When study I/C number reaches predetermined value when above (step S252: be), CPU41 uses up decision method with ink and switches the position and be set as " 1 " (step S253).So, after powering on or change print cartridge 100 next time, CPU41 can judge that the ink among the EEPROM45 uses up decision method and switch the position and be " 1 " (step S210: no), and carries out the determination processing that ink is used up according to the study sensor detection ink value of using up.

Use up decision method when ink and switch the position when being set as " 1 ", using up decision method with ink, to switch the position identical when being made as " 0 ", carries out the cleaning (step S254) of printing treatment, flushing or print head 35.In step S210, when judging that ink is used up determination methods switching position as " 1 " (step S210: no), in step S254, carry out similarly the cleaning (step S254) of printing treatment, flushing or print head 35.Then, when the reckoning consumption of print cartridge 100 reached the study sensor detection ink value of using up, judging part 413 judgement inks were used up (step 257: be).When calculating that consumption does not reach the study sensor detection ink value of using up (step 257: no), ink is used up and is judged that processing is back to step S254, proceeds the cleaning of printing treatment, flushing or print head 35.

When judging part 413 detected the ink value of using up and carries out judgement that ink uses up according to the study sensor, using up determination methods with ink, to switch the situation of position when being " 0 " identical, carries out the processing of above-mentioned steps S280.

If carry out as described above the judgement that ink is used up, then the reckoning consumption when judging that based on the output of sensor 90 ink is used up calculates the study sensor and detects the ink value of using up.And, the statistical value of the reckoning consumption when the sensor detection ink that the ink value of using up that detects the study sensor calculates for sensor 90 breaks down is before used up, whenever new print cartridge has been installed, consumed its ink, and when judging that by sensor 90 inks are used up, all the study sensor is detected the ink value of using up and upgrade.Therefore, when sensor breaks down, calculating that consumption reaches the moment that the study sensor detects the ink value of using up, can judge that ink uses up.

E – 7: variation 7:

In above-mentioned the 3rd embodiment, after the judgement ink is about to use up (the step S30 of Figure 13 or step S59), when having consumed predetermined China ink amount by a counting, judging part 413 judgement inks are used up.In addition, judging part 413 also can judge that ink uses up based on sensor 90, and study is calculated that the consumption variance rate upgrades.And, identical with the 3rd embodiment, also can calculate that consumption variance rate, study sensor detect the ink value of using up and reckoning consumption and judge that ink uses up according to study.

Figure 20 is the flow chart that the ink of control part 40 execution is used up determination processing.Be with the difference of above-mentioned variation 6, when judging that according to the output of sensor 90 ink is used up, in variation 6, the study sensor is detected the ink value of using up and upgrade (the step S240 of Figure 19), and in this variation, study reckoning consumption variance rate is upgraded (the step S345 of Figure 20).The method of study is identical with above-mentioned the 3rd embodiment.In addition, in variation 6, when sensor 90 can not use, and study I/C number is when sufficient, and judging part 413 detects the ink value of using up judgement ink according to the study sensor and uses up (step 257 of Figure 19).Relative therewith, in this variation, the formula (4) of study section 414 by illustrating among the 3rd embodiment, to learn to calculate that the consumption variance rate is transformed to the study sensor and detects the ink value of using up, when calculating that consumption reaches the study sensor detection ink value of using up, judging part 413 judgement inks are used up (the step S359 of Figure 20).About other processing, since identical with variation 7, therefore in this description will be omitted.Utilize this method, if according to calculating that based on study study sensor that the consumption variance rate is tried to achieve detects the ink value of using up and judges that ink uses up, then the deviation of ink residual China ink amount after using up and judging will diminish, thus the residual China ink amount after correctly dead reckoning sensor detection ink is used up.Effective China ink that therefore, can not consume in the print cartridge 100 is measured with remaining.

E – 8: variation 8:

In above-mentioned the 2nd embodiment, when the reckoning consumption of print cartridge ICb reaches when detecting the ink value of using up by the study sensor of calculating with the reciprocal multiplication of correction factor, the ink among the judging part 413 judgement print cartridge ICb is about to use up (the step S57 of Fig. 7).Replace aforesaid way, the ink when the study sensor that judging part 413 also can reach at the product of the reckoning consumption of correction factor and print cartridge ICb print cartridge ICa detects the ink value of using up among the judgement print cartridge ICb is about to use up.

E – 9: variation 9:

Printing equipment 10 is not limited only to the ink jet type printing equipment, can be the various printing equipments that use various fluids to print.For example, printing equipment 10 also can be laser printer.

E – 10: variation 10:

In the above-described embodiments, calculate the study sensor by the weighted average shown in the formula (1) and detect the ink value of using up, calculate study by the arithmetic average shown in the formula (3) and calculate the consumption variance rate, detect the ink value of using up and learn to calculate that the computational methods of consumption variance rate are not limited to said method but learn sensor.In the 1st embodiment and the 2nd embodiment, also can utilize arithmetic average to calculate the study sensor and detect the ink value of using up, in the 3rd embodiment, also can utilize weighted average to calculate study and calculate the consumption variance rate.In addition, for example, also can utilize the computational methods of other mean values such as geometric average to calculate.In addition, the study sensor of calculating before also can preserving detects the ink value of using up, study reckoning consumption variance rate, and calculates its median or value the most frequently.And, when calculating study reckoning consumption variance rate, also can make the product of factor alpha and reckoning consumption variance rate just calculate that in study the ratio that accounts in the consumption variance rate is larger.

E – 11: variation 11:

In the above-described embodiments, being applied to printing equipment and print cartridge take the present invention is illustrated as example, but the present invention both can be used for spraying or discharging the liquid consuming device of other liquid except ink, also can be applied to the liquid container of receiving fluids as described above.In addition, liquid container of the present invention can be applied to possess the various liquid consuming devices of the jet head liquid of discharging the small quantity drop." drop " refers to shoot out from described liquid injection apparatus the state of the liquid that, and comprises granular, tear shape, also comprises the shape of trailing into wire.In addition, " liquid " said here refers to the material that can eject from liquid injection apparatus.For example, the material of any state when being in liquid phase, high viscosity or low viscous liquid, colloidal sol, gel, inorganic solvent, organic solvent, solution, liquid resin, the such fluid of liquid metal (metallic solution), also be not limited in addition the liquid as a kind of state of material, also comprised the functional material that is formed by solid such as pigment or metallic particles particle dissolving, disperse or be blended in the solvent and the material that forms etc.In addition, also can exemplify out the ink mentioned in above-described embodiment or liquid crystal etc. as the representational example of liquid.At this, ink comprises the various fluid compositions such as general water-base ink, oily ink and gel ink, hot melt ink.As the concrete example of liquid injection apparatus, such as the liquid injection apparatus that sprays following liquid is arranged: this liquid with disperse or the mode of dissolving contain making liquid crystal display, EL(electroluminescent) materials such as the electrode material that uses when display, face active display, filter etc. and color material.Perhaps, also can be: spray the biological organic liquid injection apparatus for the manufacture of biochip; Be used as precise pipet and injection as the liquid injection apparatus of the liquid of test portion.In addition, also can adopt: to the liquid injection apparatus of the precision optical machineries such as clock and watch or camera location (pinpoint) jet lubrication oil; Spray the liquid injection apparatus of the transparent resin liquid such as ultraviolet curable resin on the substrate in order to be formed on upper little dome lens (optical lens) of using such as optical communication device etc.; For substrate etc. is carried out etching and spray the liquid injection apparatus of the etchants such as acid or alkali.

Claims

1. liquid consuming device has:

Liquid container, this liquid container can be changed;

Sensor, whether the liquid that detects in the described liquid container has reached predetermined amount;

The fault of described sensor detects in fault detect section;

The reckoning value of the consumption of the liquid in the described liquid container is calculated by reckoning section; And

Judging part judges whether described liquid has reached described predetermined amount,

When detecting the fault of described sensor, described judging part carries out described judgement according to the described reckoning value that is installed at present the liquid container in the described liquid consuming device with based on the threshold value that threshold information determines; When not detecting the fault of described sensor, described judging part carries out described judgement based on described sensor, and the described reckoning value when detecting described liquid and reached described predetermined amount according to described sensor is calculated described threshold information.

2. liquid consuming device according to claim 1 is characterized in that,

Described threshold information is calculated based on following ratio, and this ratio is the described reckoning value of described sensor when detecting liquid in the described liquid container and having reached described predetermined amount and the ratio of the theoretical value of the consumption of the described liquid of the liquid in the described liquid container when reaching described predetermined amount.

3. liquid consuming device according to claim 2 is characterized in that,

Described judging part is obtained the statistical value of described ratio as described threshold information,

When detecting the fault of described sensor, the value that the theoretical value of the consumption of the described liquid when described judging part reaches described predetermined amount with described liquid draws divided by described threshold information is as described threshold value.

4. liquid consuming device according to claim 1 is characterized in that,

Described liquid container can be replaced by the capacity liquid container different from it,

In described liquid consuming device, be equipped with at present in capacity and the situation as the different liquid container of the liquid container of benchmark,

When the fault of described sensor being detected, the ratio of the theoretical value of the consumption of the theoretical value of the consumption of the described liquid the when liquid in the described judging part liquid container different according to described capacity reaches described predetermined amount and described described liquid while as the liquid in the liquid container of benchmark, reaching described predetermined amount, and the described threshold information of described liquid container as benchmark, calculate the described threshold value that is applicable to the different liquid container of described capacity, and the described reckoning value of the liquid container different with described capacity according to this threshold value is carried out described judgement

When not detecting the fault of described sensor, described judging part carries out described judgement based on described sensor, and the described reckoning value when detecting liquid in the different liquid container of described capacity and reached described predetermined amount according to described sensor, and the ratio of the theoretical value of the consumption of the theoretical value of the consumption of the described liquid of the liquid in the different liquid container of described capacity when reaching described predetermined amount and described described liquid when reaching described predetermined amount as the liquid in the liquid container of benchmark, calculate the described threshold information of described liquid container as benchmark.

5. liquid consuming device according to claim 4 is characterized in that,

When the different liquid container of present described capacity is installed in the described liquid consuming device,

As described threshold information, the theoretical value of the consumption of the described liquid the when theoretical value that described judging part is obtained the consumption of described described liquid when reaching described predetermined amount as the liquid in the liquid container of benchmark reaches described predetermined amount divided by the liquid in the different liquid container of described capacity and the correction value that draws, the product of the described reckoning value when having reached described predetermined amount from liquid in described sensor detects the different liquid container of described capacity, and described sensor detects the statistical value of described described reckoning value when having reached described predetermined amount as the liquid in the liquid container of benchmark

When detecting the fault of described sensor, described judging part draws described threshold information divided by described correction value value is as described threshold value.

6. liquid consuming device according to claim 1 is characterized in that,

As described threshold information, the statistical value of the described reckoning value when described judging part is obtained described sensor and detected described liquid and reached described predetermined amount,

When detecting the fault of described sensor, the value that described judging part will be identical with described threshold information is as described threshold value.

7. according to claim 3, each the described liquid consuming device in 5,6, it is characterized in that,

Described statistical value is calculated according to weighted mean method, and the weight of the value of recently addition is maximum.

8. the described liquid consuming device of each according to claim 1-7 is characterized in that,

Have a plurality of described liquid containers,

Described judging part is calculated respectively described threshold information for each described liquid container.

9. according to claim 1-3, each the described liquid consuming device among the 6-8, it is characterized in that,

Described liquid container can be replaced by the different liquid container of capacity,

Described judging part is calculated respectively described threshold information for the different liquid container of each described capacity.

10. the described liquid consuming device of each according to claim 1-9 is characterized in that,

When the described threshold information of calculating reaches pre-determined number when above, described judging part carries out described judgement according to described reckoning value and described threshold value.

11. the determination methods of a liquid residue is used for liquid consuming device, this liquid consuming device has: liquid container, and this liquid container can be changed; And sensor, whether the liquid that detects in the described liquid container has reached predetermined amount,

The determination methods of described liquid residue may further comprise the steps:

Detect the detecting step of the fault of described sensor;

Calculate the liquid in the described liquid container consumption the reckoning value calculate step; And

Judge whether described liquid has reached the determining step of described predetermined amount,

In described determining step, when detecting the fault of described sensor, carry out described judgement according to the described reckoning value that is installed at present the liquid container in the described liquid consuming device with based on the threshold value that threshold information determines, when not detecting the fault of described sensor, carry out described judgement based on described sensor, and the described reckoning when detecting described liquid and reached described predetermined amount according to described sensor is worth to calculate threshold information.